<html>
    <head>
        <title>Hello</title>
        <style>
            h1 {
                color: #333333;
                font-size: 48px;
                text-shadow: 3px 3px 3px #666666;
            }
        </style>
        <script type="text/javascript">
            function change() {
                document.getElementsByTagName('h1')[0].style.color = '#ff0000';
            }
        </script>
    </head>
    <body>
        <h1 onclick="change()">Hello, world!</h1>
    </body>
</html>
